mitt romney is there today as well. susan mcginnis is in washington with more on all this. good morning to you. >> good morning. the candidates are spending every minute they can in battleground states that hold those crucial electoral votes. meanwhile, some comments by a republican senate candidate have interrupted both campaigns. 13,000 people packed a las vegas park for a late night rally featuring president obama and katy perry. ♪ >> it is part of a 40-hour, six-state campaign swing. >> we are pulling an all-nighter, no sleep. if you are not going to sleep, you might as well be in vegas. >> reporter: the president campaigns in florida and va v.a. he will vote in his hometown of chicago and finish the night in ohio. >> ohio could well be the place that elects the next president of the united states. >> reporter: mitt romney will focus entirely on ohio with rallies in cincinnati and columbus. he says he is gaining ground in the polls because he believes the president has no plon for a second ternl. >> they have been unable to describe what they are going to do to get ou